Hello Python developers!I'm looking to deploy Python 3 silently to the Macs that I manage, so I can use Python for various scripts. I'm using Munki to accomplish this. However, the Python_Documentation.pkg subpackage includes this code in the postinstall script:```# make link in /Applications/Python m.n/ for Finder usersif [ -d "${APPDIR}" ]; then    ln -fhs "${FWK_DOCDIR}/index.html" "${APPDIR}/Python Documentation.html"    open "${APPDIR}" || true  # open the applications folderfi```Would it be possible to test for the $COMMAND_LINE_INSTALL variable before opening a Finder window? If the $COMMAND_LINE_INSTALL exists, it'd be really great if it didn't open the Finder. This would allow me to silently deploy Python 3 without disrupting my users.Thanks!Mike

In case folks reading this are not aware, installer(8) sets an environmental variable COMMAND_LINE_INSTALL when an installation is triggered on the command line versus when a user double-clicks a package in the GUI to kick off the install.I've filed the linked PR to add a test on the APPDIR open statement to avoid popping up the Finder when the package is installed on the command line. If there's a different method by which I should do this, please point me in the vague direction and I'm happy to update!(note - I just signed the CLA today so it should be registered soonish)

Thanks for the PR! It looks reasonable but I do want to test it first on older macOS versions that we support before merging it. I'll do that before the next releases.

New changeset966036af0e5e1dff8fedd423d90a246067537345 by Ned Deily in branch '3.7':bpo-39580: add check for CLI installation on macOShttps://github.com/python/cpython/commit/966036af0e5e1dff8fedd423d90a246067537345

New changeset5f190d2cc60cd82a604cbffb58b6ca8f40350a7a by Rick Heil in branch 'master':bpo-39580: add check for CLI installation on macOS (GH-20271)https://github.com/python/cpython/commit/5f190d2cc60cd82a604cbffb58b6ca8f40350a7a

New changeset4564ebb1e62378d350d5483b0ae5d0d84082af2b by Miss Islington (bot) in branch '3.8':bpo-39580: add check for CLI installation on macOS (GH-20271)https://github.com/python/cpython/commit/4564ebb1e62378d350d5483b0ae5d0d84082af2b

New changesetbdc55eb55f7a88e374593dea1257566c2db3f5e4 by Miss Islington (bot) in branch '3.9':bpo-39580: add check for CLI installation on macOS (GH-20271)https://github.com/python/cpython/commit/bdc55eb55f7a88e374593dea1257566c2db3f5e4

Thanks again for the PR. The change will be included in python.org installers for macOS as of 3.9.0b4, 3.8.4, and 3.7.8.